A power outage temporarily stranded 38 passengers on the monorail at the California State Fair today.

State Fair officials say there were 38 passengers aboard the monorail when it stopped working, due to an apparent power outage. Early reports said there were 20 people stranded. Fair officials say all were safely evacuated by firefighters within an hour of the break-down, which happened yesterday about 4:15 p.m.

CAL-OSHA has been called in to investigate. The agency oversees public safety on amusement park rides.

The train will remain out of service until the ride is inspected and repaired. Themonorail underwent a one million dollar renovation just two years ago.

5:38 update) State Fair tweeted: "All passengers are safe. Water has been delivered and we are working on the situation."

The Monorail at Cal Expo lost power this afternoon, temporarily stranding about twenty people who were riding it.

As of 5:15, Sacramento City Fire was helping people out of the monorail cars and into baskets to be lowered to the ground. The monorail travels about 25 feet above the ground.

Cal Expo says no one was injured and State Fair staff provided water to the people in the cars as quickly as possible.